The Touch Events API lets you track multiple touches at the same time on devices that support them. Build complex games, support pinch-to-zoom and more. By using multi-touch, your app can respond to all the interactions users have come to expect.

With the maturing offline capabilities of the open Web, you can build apps that work with or without an Internet connection. With offline technologies, you can better support travelers and mobile users, improve performance, and more.

CSS Media Queries are now a common tool for responsive, mobile-first web design. They are now even a W3C Recommendation! They can tell you a lot more about a display than just its width. What can you do with Media Queries?

Creating rich user experiences for the Web has never been easier. Today's open Web standards put some of the most powerful features right at your fingertips. Animate pages with CSS, validate user input with HTML, and more. What else can you do without JavaScript?

Canvas lets you paint the Web using JavaScript to render 2D shapes, bitmapped images, and advanced graphical effects. Each <canvas> element provides a graphics context with its own state and methods that make it easy to control and draw in.